The knotless knot with a hair rig is the absolute essential carp rig. For beginners use to putting the bait straight on the hook this is the quickest easiest way to catch spooky fish and to keep nuisance fish off your hook.
If you own then you’ll need to learn to give them shots. Goats need a CD/T (and BO-SE in some areas) shot annually and most antibiotics have to be administered via injection . so it’s a skill goat owners have to learn.